// Copyright (c) 2023 Huawei Device Co., Ltd.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::io;

use crate::builder::common_builder::impl_common;
use crate::builder::CommonBuilder;
use crate::executor::current_thread::CurrentThreadSpawner;
use crate::executor::{AsyncHandle, Runtime};

/// RuntimeBuilder struct with current_thread settings.
pub struct CurrentThreadBuilder {
    pub(crate) common: CommonBuilder,
}

impl CurrentThreadBuilder {
    pub(crate) fn new() -> Self {
        CurrentThreadBuilder {
            common: CommonBuilder::new(),
        }
    }

    /// Initializes the runtime and returns its instance.
    pub fn build(&mut self) -> io::Result<Runtime> {
        let async_spawner = CurrentThreadSpawner::new();
        Ok(Runtime {
            async_spawner: AsyncHandle::CurrentThread(async_spawner),
        })
    }
}

impl_common!(CurrentThreadBuilder);
